Skateboard



FIG. 1 is a top front perspective view of a skateboard;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof, the rear elevation view being a mirror image thereof;

FIG. 5 is a right elevation view thereof; and,

FIG. 6 is a left elevation view thereof.

The broken lines shown in the drawings depict portions of the skateboard that form no part of the claimed design. 

CLAIM The ornamental design for a skateboard, as shown and described. 